Will Avengers: Infinity War have Cap, BW, Hawkeye, Iron Man and Thor?

So with this announcement of the new Marvel movies planned up to 2019, we know Hulk will be in the Avengers movies, but will the others reprise their roles? If not, I'd be disapointed. I can go without Black Widow and Hawkeye, yet straight characters make the team work. Iron Man, well, I don't mind. Definitely Hulk, but that means I still want Captain America and Thor.